// [END bigtable_filters_limit_row_sample]

        // [START bigtable_filters_limit_row_regex]
        /// <summary>
        /// /// Read using a row regex filter from an existing table.
        ///</summary>
        /// <param name="projectId">Your Google Cloud Project ID.</param>
        /// <param name="instanceId">Your Google Cloud Bigtable Instance ID.</param>
        /// <param name="tableId">Your Google Cloud Bigtable table ID.</param>

        public string filterLimitRowRegex(string projectId = "YOUR-PROJECT-ID", string instanceId = "YOUR-INSTANCE-ID", string tableId = "YOUR-TABLE-ID")
        {
            // A filter that matches cells from rows whose keys satisfy the given regex
            RowFilter filter = RowFilters.RowKeyRegex(".*#20190501$");

            return(readFilter(projectId, instanceId, tableId, filter));
        }
        public void RowKeyRegex()
        {
            var filter = RowFilters.RowKeyRegex("abc");

            Assert.Equal(ByteString.CopyFromUtf8("abc"), filter.RowKeyRegexFilter);
        }